Harry Robbins Haldeman (publicly known as H. R. Haldeman, and informally as Bob Haldeman) (October 27, 1926-November 12, 1993) was a U.S. political aide and businessman, best known for his service as White House Chief of Staff to President Richard Nixon and for his role in events leading to the Watergate burglaries and the Watergate scandal - for which he was found guilty of conspiracy and obstruction of justice. He was imprisoned for 18 months for his crimes. In the popular press, Haldeman was sometimes erroneously identified as "H. Robert Haldeman." In the White House, he was nicknamed "The Brush" for his distinctive flattop haircut